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Mean

The marks obt...

Question

The marks obtained by 12 students in a mathematics examination are given below.

48, 78, 93, 90, 66, 54, 83, 58, 60, 75, 89, 84.

Find (i) the mean of the marks; (ii) the mean mark of the students if each student is given 4 grace marks.

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Solution

The given marks are: 48, 78, 93, 90, 66, 54, 83, 58, 60, 75, 89, 84

(i) The mean of the these marks can be calculated as:

(ii) If each student gets 4 grace marks, the new marks become:

52, 82, 97, 94, 70, 58, 87, 62, 64, 79, 93, 88

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